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Proceedings Paper

Continuous and pulsed discharges in gas flow lasers
Author(s): Kazuo Maeno; Shinichiroh Kosugi; N. Yamaguchi
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Paper Abstract

The discharge effects on gas flow lasers have been treated from both aspects of the activating features to the laser performance and of demerits by electrical heating and disturbances in the laser medium. The approach has been from two types of studies, namely on the continuous discharge in CO2 supersonic mixing electric discharge laser (EDL) and on the pulsed discharge in excimer laser. For CO2 supersonic mixing EDL, small scale experiments have been performed on the small signal gain coefficient and on the laser power, together with the numerical analysis by using the quasi-one-dimensional and vibrationally nonequilibrium equation system. Discharge effect is included by solving the Boltzmann equation for electron energy distribution function, and power extraction analysis also is carried out. By comparing the experimental results, various characteristics have been clarified on this type of supersonic discharge laser. As for the pulsed discharge, flow visualization experiments have been conducted in the model cavity of excimer laser, along with a numerical calculation on the one- dimensional Euler equation system by TVD approach. There have been three types of waves in the laser cavity, and Mach numbers of horizontally propagating main waves have been discussed from both numerical and experimental aspects.

Paper Details

Date Published: 4 May 1993
PDF: 8 pages
Proc. SPIE 1810, 9th International Symposium on Gas Flow and Chemical Lasers, (4 May 1993); doi: 10.1117/12.144625
Show Author Affiliations
Kazuo Maeno, Chiba Univ. (Japan)
Shinichiroh Kosugi, Chiba Univ. and Toshiba Corp. (Japan)
N. Yamaguchi, IHI Trumph Technologies, Ltd. (Japan)

Published in SPIE Proceedings Vol. 1810:
9th International Symposium on Gas Flow and Chemical Lasers
Costas Fotakis; Costas Kalpouzos; Theodore G. Papazoglou, Editor(s)

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